Linux Python Azure Function APP - pyodbc module not found despite being in requirements.txt and other modules working fine

I'm using a Linux consumption plan.

I get the following error; Exception: ModuleNotFoundError: No module named 'pyodbc'

I have added pyodbc in the requirements.txt file and other modules in this file such as azure-storage are working fine.

Has anyone seen this issue or can confirm this is a known bug? I can't see any way to manually install this.

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